package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.service.SetmealService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    WebSocketServer webSocketServer;
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //判断各种业务异常：地址不存在，购物车为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException("地址不存在");
        }


        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list == null || list.size() == 0) {
            throw new ShoppingCartBusinessException("购物车为空");
        }
        //像订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());

        orderMapper.insert(orders);
        //向订单明细表插入多条数据
        List<OrderDetail> orderDetails = new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetails);
        //清空当前用户购物车
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
        //封装返回结果并返回
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return  orderSubmitVO;
    }

    @Override
    public PageResult historyOrders(int page, int pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);
       //我要设置一个DTO
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> pagee = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orders = new ArrayList<>();
        if(pagee != null && pagee.getTotal() > 0){
            for (Orders order : pagee) {
                Long orderId = order.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);



                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orders.add(orderVO);
            }
        }
        PageResult pageResult = new PageResult(pagee.getTotal(),orders);
        return pageResult;
    }

    @Override
    public OrderVO orderDetail(Long id) {
        Orders order = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;

    }



    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
        JSONObject jsonObject = new JSONObject();
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号"+outTradeNo);

        webSocketServer.sendToAllClient(JSON.toJSONString(map));

    }

    @Override
    public void cancel(Long id) {
        Orders or = orderMapper.getById(id);
        if(or== null){
            throw new OrderBusinessException("订单不存在");
        }
        if(or.getStatus() >2){
            throw new OrderBusinessException("订单不能取消");
        }
        Orders orders=new Orders();
        orders.setId(or.getId());
        if(or.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            orders.setPayStatus(Orders.REFUND);
        }




         orders = Orders.builder()
                .id(id)
                .status(Orders.CANCELLED)
                .cancelReason("用户取消")
                .cancelTime(LocalDateTime.now())
                .build();
                orderMapper.update(orders);
    }

    @Override
    public void reOrder(Long id) {
        Long userId = BaseContext.getCurrentId();
        //查询当前订单详情
       List<OrderDetail>  orderDetail = orderDetailMapper.getByOrderId(id);
        //将当前订单详情转换成购物车数据
        List<ShoppingCart> shoppingCartList = orderDetail.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        //插入到购物车数据
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public PageResult conditionalSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList=getOrderVOList(page);
        PageResult pageResult=new PageResult(page.getTotal(), orderVOList);
        return pageResult;
    }

    @Override
    public OrderStatisticsVO statistics() {
        Integer confirmed = orderMapper.countByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countByStatus(Orders.DELIVERY_IN_PROGRESS);
        Integer toBeConfirmed = orderMapper.countByStatus(Orders.TO_BE_CONFIRMED);
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);

        return orderStatisticsVO;
    }

   @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO)throws  Exception {
        Long orderId = ordersRejectionDTO.getId();
        String rejectionReason = ordersRejectionDTO.getRejectionReason();
        Orders ordersDB = orderMapper.getById(orderId);
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException("订单不存在");
        }
        Orders orders=new Orders();
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(rejectionReason);
        orders.setId(orderId);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);


        }

    @Override
    public void cancele(OrdersCancelDTO ordersCancelDTO) {
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());


        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);


    }

    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException("订单不存在");
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update( orders);
    }

    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException("订单不存在");
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders order=Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
                orderMapper.update(order);
    }

    @Override
    public void reminder(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if(ordersDB==null){
            throw new OrderBusinessException("订单不存在");
        }
        Map map=new HashMap();
        map.put("id",ordersDB.getId());
        map.put("status",(int)2);
        map.put("content", "订单号"+ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));


    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList=new ArrayList<>();


        List<Orders> ordersList =page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for(Orders orders: ordersList)
            {
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDish=getOrderDishesStr(orders);
                orderVO.setOrderDishes(orderDish);
                orderVOList.add(orderVO);

            }
        }
        return orderVOList;
    }

    private String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        //TODO
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);


    }
}
